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What is the difference between an independent and a dependent variable? Does a regression model imply causation? Why or why not?
Why can not we just do several two sample tests like we did in the last week. In your own words explain briefly also tell us what these are and what did it mean.
A research analyst regresses the number of calls for service (Y) on the Fahrenheit temperature at 4:00 in the afternoon (X). The regression equation finds: Y = 62 + 2.4 X with an r 2 of .67
The incarceration rate in one nation's prisons was 965 per 100,000 male residents, and 65 per 100,000 female residents.
I have computed an analysis of variance for three groups with 10 observations per group. Evaluate the degrees of freedom for the F test
In healthy adults, x is approximately normally distributed with mean µ = 38 and standard deviation σ = 12. What is the probability that:
Your mayor just announced that the local unemployment rate dropped last month from the prior month. It went from 10.5% to 10.4%. Is this a significant drop? Explain.
Do the data demonstrate that the true mean photometer reading for the color density is significantly different from 12 at 3 percent level of significance?
A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is .02. What is the probability that:
WHich sampling method from the choices listed above would be best? Describe how you would carry out your chosen sampling method of a student from part (a)
Which of the following is true about a 95% confidence interval of the mean of a given sample:
After the presidential debates, a random sample of 1200 voters showed that 540 favored the Democratic candidate; 480 were in favor of the Republican candidate; 40 were in favor of the Independent candidate, and 140 were undecided. At a 1% level of..
The difference between a random variable and a probability distribution is: A. A random variable does not include the probability of an event. B. A random variable can only assume whole numbers
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